51663849 has 8 divisors (see below), whose sum is σ = 69595680. Its totient is φ = 34087296.

The previous prime is 51663847. The next prime is 51663851. The reversal of 51663849 is 94836615.

51663849 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (51663847) and next prime (51663851).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 51663849 - 2¹ = 51663847 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 51663849.

It is not an unprimeable number, because it can be changed into a prime (51663847) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 88479 + ... + 89060.

It is an arithmetic number, because the mean of its divisors is an integer number (8699460).

Almost surely, 2^51663849 is an apocalyptic number.

It is an amenable number.

51663849 is a deficient number, since it is larger than the sum of its proper divisors (17931831).

51663849 is a wasteful number, since it uses less digits than its factorization.

51663849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 177639.

The product of its digits is 155520, while the sum is 42.

The square root of 51663849 is about 7187.7568823660. The cubic root of 51663849 is about 372.4450895743.

The spelling of 51663849 in words is "fifty-one million, six hundred sixty-three thousand, eight hundred forty-nine".